== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:13:05 (1781683985)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.83864 s, 18.0 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff8da0593a0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.86452
Iter 1/10: OSS cache speed: 2.07692
Iter 1/10: ladvise speed: 1.86308
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.91925
Iter 2/10: OSS cache speed: 1.86719
Iter 2/10: ladvise speed: 1.78029
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.91468
Iter 3/10: OSS cache speed: 1.96945
Iter 3/10: ladvise speed: 2.07088
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.11291
Iter 4/10: OSS cache speed: 1.93629
Iter 4/10: ladvise speed: 2.15771
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.03374
Iter 5/10: OSS cache speed: 2.02901
Iter 5/10: ladvise speed: 1.77783
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.90938
Iter 6/10: OSS cache speed: 2.07932
Iter 6/10: ladvise speed: 2.02327
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.98139
Iter 7/10: OSS cache speed: 2.02201
Iter 7/10: ladvise speed: 0.733309
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.99356
Iter 8/10: OSS cache speed: 0.945397
Iter 8/10: ladvise speed: 1.19438
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.44108
Iter 9/10: OSS cache speed: 1.62527
Iter 9/10: ladvise speed: 1.14378
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.620824
Iter 10/10: OSS cache speed: 0.290795
Iter 10/10: ladvise speed: 0.443934
Average uncached read: 1.67
Average speedup with OSS cached read:  1.68 = +0%
Average speedup with ladvise willread:  1.51 = +-9%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0